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Related Experiment Videos

Amylooligosaccharides from Mycobacterium smegmatis.

H Yamada, C E Ballou

    Journal of Bacteriology
    |July 1, 1979
    PubMed
    Summary

    Mycobacterium smegmatis accumulates alpha 1 to 4-glucooligosaccharides during early growth. These oligosaccharides serve as precursors for glycogen synthesis, not lipopolysaccharide.

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    Area of Science:

    • Microbiology
    • Bacterial Physiology
    • Carbohydrate Metabolism

    Background:

    • Mycobacterium smegmatis is a model organism for studying mycobacterial physiology.
    • Understanding carbon storage and cell wall biosynthesis is crucial in mycobacteria.
    • Previous studies have identified various polysaccharides in M. smegmatis.

    Purpose of the Study:

    • To investigate the nature and function of accumulated oligosaccharides in Mycobacterium smegmatis.
    • To determine whether these oligosaccharides are precursors to lipopolysaccharide or glycogen.

    Main Methods:

    • Analysis of oligosaccharide accumulation in M. smegmatis cultures during stationary phase.
    • Characterization of the chemical structure of the accumulated oligosaccharides.
    • Comparison of oligosaccharide structure with known precursors of lipopolysaccharide and glycogen.

    Main Results:

    • Accumulation of amylooligosaccharides (alpha 1 to 4-glucooligosaccharides) up to the undecasaccharide level was observed in early stationary phase.
    • The structure of these oligosaccharides is consistent with precursors of alpha 1 to 4-glucans.
    • M. smegmatis also produces an acylated polymethylpolysaccharide, predominantly an alpha 1 to 4-glucan.

    Conclusions:

    • The accumulated alpha 1 to 4-glucooligosaccharides are concluded to be precursors of glycogen.
    • These oligosaccharides are not precursors of lipopolysaccharide in M. smegmatis.

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